function createCode()  
     {   
       code = "";  
       var codeLength = 4;//验证码的长度  
       var checkCode = document.getElementById("checkCode");  
       var selectChar = new Array(0,1,2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');//所有候选组成验证码的字符，当然也可以用中文的  
          
       for(var i=0;i<codeLength;i++)  
       {  
        
          
       var charIndex = Math.floor(Math.random()*36);  
       code +=selectChar[charIndex];  
         
         
       }  
//       alert(code);  
       if(checkCode)  
       {  
         checkCode.className="code";  
         checkCode.value = code;  
       }  
         
     }  
function Login(){
		
	   jQuery( "#mylogin" ).dialog({ 
	       width:600,  
         height:490, 
	       close: function() {
				allFields.val( "" ).removeClass( "ui-state-error" );
			} });
		}
